Scheduled Jobs Management
From OpenCms Wiki
Contents |
[edit] What is a Scheduled Job
A Scheduled Job is a piece of code that runs on a regular basis. It can be one of the OpenCms jobs that's in the java class drop-down list, or you can create your own Scheduled Job in java (this requires a java developer), and type the class name in.
[edit] Included Scheduled Jobs
OpenCms 6.2.3 comes with the following jobs that can be selected from the drop down list:
- CmsPublishJob - will automatically publish the selected project at the given time
- CmsStaticExportJob - automatically exports the specified resources to the exports folder
- CmsPointerLinkValidator - Validates all the "Pointer" type links - that is the structured type External Links, I think. I'm not sure where this reports to
- CmsMemoryMonitor - writes information about the server's memory status to the logfile.
- CmsSearchManager - re-indexes the specified search index
- CmsContentNotificationJob - notifies any parties set as "responsible" in the Permissions dialog that their content has expired or has been unchanged for a long time
- CmsCreateImageSizeJob - creates image size information for all resources of the type "Image"
- CmsImageCacheCleanupJob - clears out the image loader cache
[edit] Reuse instance
Specifies whether the Java class will be created every time the job is called, or one instance will be created and reused every time the job is called.
[edit] Active
Specifies whether or not the job will run. If unchecked, the job info will be saved, but the job will not run.
[edit] Cron expression
Scheduled jobs are run based off a cron expression. Cron is the name of a task scheduler for unix/Linux systems - OpenCms jobs use the same syntax.
[edit] Sample Cron Expressions
- Every 5 minutes - 0 0/5 * * * ?
- Every night at midnight - 0 0 0 * * ?
